L2: Infections in Immunocompromised Flashcards
Introduction to Immune System
Major Components of Specific Immunity
Markers of T-Suppressor Normally & in HIV
what stimulates both B & T Cells?
Clonal Selection
Def of Immunocompromised person
- Denoting an individual with deficient immunologic mechanisms either because of an immunodeficiency disorder or by immunosuppressive agents.
Def of Opportunistic
infection
- An infection by a microorganism that normally does not cause disease but becomes pathogenic when the body’s immune system is impaired and unable to fight off infection, as in AlIDS and certain other diseases
Suspicion of immunodeficiency disorder
Types of Immunodeficiency
1ry & 2ry
Nature of 1ry Immunodeficiency
Many of these disorders are hereditary and are autosomal recessive or X-linked.
Age in 1ry Immunodeficiency
Susceptibility to infections begins from childhood onward.
TTT of 1ry Immunodeficiency
The treatment of primary immunodeficiency depends on the nature of the defect, and may involve
Antibody infusions
Long-term antibiotics
Stem cell transplantation
Classification of 1ry Immunodeficiency
They are generally grouped by the part of the immune system affected such as lymphocytes, granulocytes, T cells and B cells.
Another Name of 1ry Immunodeficiency
Congenital
Types of 1ry Immunodeficiency
- Hemoglobinopathy
- Trisomy 21
- Complement Deficiency
- Phagocyte Deficiency
- B-Cell Deficiency
- T-Cell Deficiency
- Combined B&T Cell Deficiency
Def of Hemoglobinopathy
A kind of genetic defect that results in abnormal structure of one of the globin chains of the hemoglobin molecule
Infections in Hemoglobinopathy
- Common infectious agents are encapsulated organisms, particularly streptococcus pneumoniae.
- Others like salmonella sp., E-coli, H. Influenza, K. pneumonia, and Neisseria sp.
Infections Related to Trisomy 21
- Trisomy 21 are linked to otitis media and upper respiratory infections, as well as to infections with Candida.
Infections Related to Complement Deficiency
Cryptosporidia.
Meningococcal infections.
Invasive aspergillosis in immunocompromised patients.
Bancroftian Filariasis.
Phagocyte Deficiency
Infections Related to Phagocyte Deficiency
Infection Related to T-Cell Defects
Infections Related to B-Cell Defects
CP of Patients with B&T-Cell Defects
Infections Related to B&T-Cell Defects
Another Name of 2ry Immunodeficiency
Acquired
Causes of 2ry Immunodeficiency
Chronic Disease Causes of 2ry Immunodeficiency
CRF, LCF, DM
Meds Causing 2ry Immunodeficiency
- chemotherapy, anti TNF, PPI
- Immunosuppressive drugs and glucocorticoids after organ transplants
Toxins Causing 2ry Immunodeficiency
- Environmental toxins like mercury and other heavy metals, pesticides and petrochemicals